Photothermal Superhydrophobic Cotton Fabric Based on Silver Nanoparticles Cross-Linked by Polydopamine and Polyethylenimide

Abstract

Photothermal materials that can convert solar energy into heat energy through photothermal conversion have attracted extensive attention, but these materials are easily polluted by the environment. Here, we propose a simple and effective strategy for constructing photothermal superhydrophobic cotton fabrics with self-cleaning ability. The PDA@PEI@GA@Ag@ PDMS-coated cotton fabric can achieve good superhydrophobicity (water contact angle: 159.6°) by a simple dipping method and mussel-inspired dopamine surface modification, which is regulated by the mass of dopamine, the mass of silver nitrate, and the concentration of polydimethylsiloxane (PDMS). The coated cotton fabric has good physical and chemical stability. Meanwhile, the coated cotton fabric has excellent self-cleaning and antifouling properties. The superhydrophobic PDA@PEI@GA@Ag@PDMS fabric exhibits excellent and stable photothermal properties, with the surface temperature reaching 70.4 °C under simulated sunlight with a current of 20 A. This photothermal superhydrophobic fabric with self-cleaning properties is expected to be applied in the field of photothermal conversion.

Polymerization-Induced Hierarchical Hybrid Particles from Siloxane Emulsification Endowing Polyurethane Composite Coating with Superhydrophobicity, Thermal Insulation, and Fluorescence

“…Next, a glass plate coated with the HHP film is immersed in a beaker containing water, and a typical silver mirror-like surface is observed on the HHP film due to the total reflection of light (Figure B). In addition, a continuous jet of water dyed with methyl orange is bounced off after contacting with the rough surface of the HHP film (Figure C,D), resulting from the water droplets being in a typical Cassie–Baxter state where a stable air layer exists at the water/HHP interface. , The model in Figure E further illustrates the fundamental principle of the HHP film with superhydrophobicity. The dynamic contact angle of the HHP film is also shown to characterize the superhydrophobicity (Figure F).…”

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

“…However, this material was prone to contamination, which could seriously reduce its separation efficiency. 71 To solve this problem, Wu et al 72 proposed an impregnation method. They used the adhesion of dopamine and adjusted the con- In addition to the use of dopamine, plant polyphenols can also be used as a substitute for dopamine.…”

Fluorine-Free Sustainable Three-Dimensional Superhydrophobic and Superoleophilic Robust Foam for Efficient Oil/Water Separation

“…However, due to the synergistic toxicity of the oil mixture and the dispersants used, this method causes additional harm to marine ecosystems . To overcome these limitations, oil-adsorbent materials gain more attraction due to their proclivity for oil adsorption, low cost, easy fabrication, and good recyclability for oil spill cleanup separation and collection from the existing water. , However, traditional powder-based adsorbent materials generally have some drawbacks, such as environmental incompatibility, low adsorption capacity, and poor recyclability. , Alternately, foam-based adsorbents including graphene aerogel, silica foam, commercial foam, cellulose-based sorbent materials, and nickel foam materials exhibit high adsorption capacity and mechanical stability . Among various foamed materials, commercial foam-based adsorbents, such as polyurethane (PU) foam and melamine foam, have gained popularity in recent years for their efficient oil/water separation behavior due to their high flexibility, three-dimensional (3D) structure, low density, high porosity, excellent elasticity, and facile fabrication. , …”